Struct remoc_obs::hash_set::ObservableHashSet

source · [−]
pub struct ObservableHashSet<T, Codec = Default> { /* private fields */ }
Expand description

A hash set that emits an event for each change.

Use subscribe to obtain an event stream that can be used for building a mirror of this hash set.

Implementations

Creates an empty observable hash set.

Sets the error handler function that is called when sending an event fails.

Subscribes to change events from this observable hash set.

The current contents of the hash set is included with the subscription.

buffer specifies the maximum size of the event buffer for this subscription in number of events. If it is exceeded the subscription is shed and the receiver gets a RecvError::Lagged.

Subscribes to change events from this observable hash set with incremental sending of the current contents.

The current contents of the hash set are sent incrementally.

buffer specifies the maximum size of the event buffer for this subscription in number of events. If it is exceeded the subscription is shed and the receiver gets a RecvError::Lagged.

Current number of subscribers.

Adds a value to the set.

A HashSetEvent::Set change event is sent.

Returns whether the set did have this value present.

Panics

Panics when done has been called before.

Adds a value to the set, replacing the existing value, if any.

A HashSetEvent::Set change event is sent.

Returns the replaced value, if any.

Panics

Panics when done has been called before.

Removes the value under the specified key.

A HashSetEvent::Remove change event is sent.

Returns whether the set did have this value present.

Panics

Panics when done has been called before.

Removes the value under the specified key.

A HashSetEvent::Remove change event is sent.

Returns the removed value, if any.

Panics

Panics when done has been called before.

Removes all items.

A HashSetEvent::Clear change event is sent.

Panics

Panics when done has been called before.

Retains only the elements specified by the predicate.

A HashSetEvent::Remove change event is sent for every element that is removed.

Panics

Panics when done has been called before.

Shrinks the capacity of the hash set as much as possible.

A HashSetEvent::ShrinkToFit change event is sent.

Panics

Panics when done has been called before.

Prevents further changes of this hash set and notifies are subscribers that no further events will occur.

Methods that modify the hash set will panic after this has been called. It is still possible to subscribe to this observable hash set.

Returns true if done has been called and further changes are prohibited.

Methods that modify the hash set will panic in this case.

Extracts the underlying hash set.

If done has not been called before this method, subscribers will receive an error.

Methods from Deref<Target = HashSet<T>>

Returns the number of elements the set can hold without reallocating.

Examples
use std::collections::HashSet;
let set: HashSet<i32> = HashSet::with_capacity(100);
assert!(set.capacity() >= 100);

An iterator visiting all elements in arbitrary order. The iterator element type is &'a T.

Examples
use std::collections::HashSet;
let mut set = HashSet::new();
set.insert("a");
set.insert("b");

// Will print in an arbitrary order.
for x in set.iter() {
    println!("{}", x);
}

Returns the number of elements in the set.

Examples
use std::collections::HashSet;

let mut v = HashSet::new();
assert_eq!(v.len(), 0);
v.insert(1);
assert_eq!(v.len(), 1);

Returns true if the set contains no elements.

Examples
use std::collections::HashSet;

let mut v = HashSet::new();
assert!(v.is_empty());
v.insert(1);
assert!(!v.is_empty());

Returns a reference to the set’s BuildHasher.

Examples
use std::collections::HashSet;
use std::collections::hash_map::RandomState;

let hasher = RandomState::new();
let set: HashSet<i32> = HashSet::with_hasher(hasher);
let hasher: &RandomState = set.hasher();

Visits the values representing the difference, i.e., the values that are in self but not in other.

Examples
use std::collections::HashSet;
let a = HashSet::from([1, 2, 3]);
let b = HashSet::from([4, 2, 3, 4]);

// Can be seen as `a - b`.
for x in a.difference(&b) {
    println!("{}", x); // Print 1
}

let diff: HashSet<_> = a.difference(&b).collect();
assert_eq!(diff, [1].iter().collect());

// Note that difference is not symmetric,
// and `b - a` means something else:
let diff: HashSet<_> = b.difference(&a).collect();
assert_eq!(diff, [4].iter().collect());

Visits the values representing the symmetric difference, i.e., the values that are in self or in other but not in both.

Examples
use std::collections::HashSet;
let a = HashSet::from([1, 2, 3]);
let b = HashSet::from([4, 2, 3, 4]);

// Print 1, 4 in arbitrary order.
for x in a.symmetric_difference(&b) {
    println!("{}", x);
}

let diff1: HashSet<_> = a.symmetric_difference(&b).collect();
let diff2: HashSet<_> = b.symmetric_difference(&a).collect();

assert_eq!(diff1, diff2);
assert_eq!(diff1, [1, 4].iter().collect());

Visits the values representing the intersection, i.e., the values that are both in self and other.

Examples
use std::collections::HashSet;
let a = HashSet::from([1, 2, 3]);
let b = HashSet::from([4, 2, 3, 4]);

// Print 2, 3 in arbitrary order.
for x in a.intersection(&b) {
    println!("{}", x);
}

let intersection: HashSet<_> = a.intersection(&b).collect();
assert_eq!(intersection, [2, 3].iter().collect());

Visits the values representing the union, i.e., all the values in self or other, without duplicates.

Examples
use std::collections::HashSet;
let a = HashSet::from([1, 2, 3]);
let b = HashSet::from([4, 2, 3, 4]);

// Print 1, 2, 3, 4 in arbitrary order.
for x in a.union(&b) {
    println!("{}", x);
}

let union: HashSet<_> = a.union(&b).collect();
assert_eq!(union, [1, 2, 3, 4].iter().collect());

Returns true if the set contains a value.

The value may be any borrowed form of the set’s value type, but Hash and Eq on the borrowed form must match those for the value type.

Examples
use std::collections::HashSet;

let set = HashSet::from([1, 2, 3]);
assert_eq!(set.contains(&1), true);
assert_eq!(set.contains(&4), false);

Returns a reference to the value in the set, if any, that is equal to the given value.

The value may be any borrowed form of the set’s value type, but Hash and Eq on the borrowed form must match those for the value type.

Examples
use std::collections::HashSet;

let set = HashSet::from([1, 2, 3]);
assert_eq!(set.get(&2), Some(&2));
assert_eq!(set.get(&4), None);

Returns true if self has no elements in common with other. This is equivalent to checking for an empty intersection.

Examples
use std::collections::HashSet;

let a = HashSet::from([1, 2, 3]);
let mut b = HashSet::new();

assert_eq!(a.is_disjoint(&b), true);
b.insert(4);
assert_eq!(a.is_disjoint(&b), true);
b.insert(1);
assert_eq!(a.is_disjoint(&b), false);

Returns true if the set is a subset of another, i.e., other contains at least all the values in self.

Examples
use std::collections::HashSet;

let sup = HashSet::from([1, 2, 3]);
let mut set = HashSet::new();

assert_eq!(set.is_subset(&sup), true);
set.insert(2);
assert_eq!(set.is_subset(&sup), true);
set.insert(4);
assert_eq!(set.is_subset(&sup), false);

Returns true if the set is a superset of another, i.e., self contains at least all the values in other.

Examples
use std::collections::HashSet;

let sub = HashSet::from([1, 2]);
let mut set = HashSet::new();

assert_eq!(set.is_superset(&sub), false);

set.insert(0);
set.insert(1);
assert_eq!(set.is_superset(&sub), false);

set.insert(2);
assert_eq!(set.is_superset(&sub), true);

Trait Implementations

Formats the value using the given formatter. Read more

Returns the “default value” for a type. Read more

The resulting type after dereferencing.

Dereferences the value.

Extends a collection with the contents of an iterator. Read more

🔬 This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

🔬 This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements. Read more

Performs the conversion.

Performs the conversion.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more